<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="lib/jquery-3.6.0.js"></script>
</head>
<body>
    <a href="" id="test-jquery">点我</a>

    <script>
        'use strict'
        // jQuery 公式  $(selector[选择器]).action()

        $('#test-jquery').click(function () {
            alert('hello,jquery');
        });
    </script>

</body>
</html>